Pumping jack



Sept. 20, 1932. w. E. CUMMINS PUMPING JACK Filed Jan. '7, 1931 2 Sheets-Sheet v INVENTOR. W f. C l/MMl/VS.

A TTORNEY.

Sept. 29, 1932. w. E. cummms 1,878,469

PUMPING JACK I Filed Jan. 7, 1951 2 Sheets-Sheet 2 INVENTOR. W E. CUM/WINS.

A TTORNE Y.

Patented Sept. 20, I932 WALTER E. cunmusgor LONG B ACH, CALIFORNIA] I rum Irma moi;

Application iiled;.Tai1uary 7,'1931; Serial no. 507,172." I

pump jacks! v .7 The'general object of the inventlon 1s to provide an improved long stroke pumping Another object of the invention is to pro-' I This invention relates to improvements in vide' an improved pumping jack wherein the sucker rodis actuatedby endless chains. I

An additional object of my invention is't'o '10 provide a pumping jack operated by endless chains wherein the chainsa're operated in a novel manner. p

' j, cOther objectS' and advantages of this in ventionlwill be apparent from the following :15 description taken in" Connection "with the accompanying drawings wherein:

I Fig. lfis a" side elevation of myimproved pumpjack. I p r Fig. 2 is an end elevation ofthe pump jack.

"2M0 H'Fig. 3 is a horizontal section taken on line 3 3 of Fig; 1. I

j F'g is a horizontalsection taken on line I of-Fig.1., i Q I Fig. 5 is a vertical section taken on line 5+5 of Fig. 1.

I Fig.6 is an enlarged sideelevation of a portion of the endless chain showing the means for connecting the pitman thereto. 7 Fig. ,7.is a section takenonline 7 7 of Fig.

o sand I 8 is a p p an view otthe parts shown Fig-T. I. I

characters I have indicated my improved pump jack generally atlO. As shown the pump 1' ack 10 includes a supporting frame 11 whichis adapted to be mounted on the derrick floor adjacent the wellca sing ,12 fr om.

which a pump" actuating-"sucker rod 13 ex tends. Directly over thesucker rod'18,I provide a crosshead 14 having tongues 15 thereon which are positioned in'guide's16 secured to the framell. The sucker rod 13" may be removably connectedto the underside such as indicatedby the connection 17 I Pivotally connected to the upper portion of thecross head as at 18, I provide a pitmanrotate.

1 mission 41 may be of any desired type and is or the cross head 14 in any suitable manner.

tending upwardly therefrom I provide apair 20 comprises a pair of spacedendless chains 22 which are mounted on spaced lower sprockets 23 and spaced upper .sprockets 24. Each of the chains 22 aremade up ofa plurality ofj'pairs of links 25 which are secured 5 togetherbypins 26. To secure the connector 21 in position be tween the chains 22 a pair of links .25 oteach chain 22 are removed and the inner links of the chain positionedinslots'27 provided in 6 I i the connector and the outer links are positioned'adjacent the outer ends of the connector. Pins 28 are then positioned-inthe pin apertures of the links and in recessesr29 provided in the connector and are secured in '6 position by pinsBO. Intermediate the length of the/connector 21', I provide a reducedrporftion 31 which is cylindrical andon which the upper end of the pitman 19 is mounted to I I I ":0 -The lower'sprockets23 are each moun'ted .on a'shaft 33and each ofwhich is'journaled' in a bearing 34 mounted on the frame "11.1 The upper sprockets 24 are each mounted on a shaft 35 each of which is journaled in a '75 bearing36"mounted on the frame-11 The bearings 136- are preferably. provided with a pluralityof shaft'apertures 36 so that'the shafts 35 may be.posit ioned different distancesfrom the shafts 33' to varytlie-lengthfgb' "of the" chains 22 and therebyfich-angefthe e I p V length ofthe stroke of the pitman 19.. f ,Referring to the drawingsby reference by endless chains 38'to sprockets 39 whichare 1 5i 1 secured to a drive shaft 40 of a speedreduction transmission tl 'whichmayincludegears to allow the speedto be varied. Thetrans-' shown as driven by a shaft42 from an electric motor 43 but any other suitable drivingme'ans I 1 maybe usedif desired." @i I g For counteracting the weight of the sus- ,pended parts and that of the fluid elevated by the pump I may provide a plurality'gof 95..

weighted members 45"whichare removably positioned on a table 46 which in Pa down position rests on a plate 47 mounted on the frame, 11. [Secured tothe table 46*and ex} table 46.

of hollow tubes 48 and secured to the plate 47 and extending upwardly therefrom I provide a'pair of rods 49 which are positioned in the tubes 48 and act as guides for the Connected to the upper ends of the tubes 48 as at 50, I provide cables 51 which are positioned over pulleys 52 and connected as'at 53 to arms 54 provided on the cross head 14. The pulleys 52 are mounted on a shaft 55 which is journaled in a bearing 56 mount ed on the frame 11. i p The sucker rod 13 when the device is not operating is preferably raised with the counter'weight table in a: lowered position as shown in Fig.1. 4

When themotor 43 is startediit' rotates the lower sprocket 23 of the chain drive device through the medium of the trans"- mission 41, the 'sprockets39, the chains 38 and the sprockets 37. As the'sprockets -23 rotate they cause the chains 22 to travel overthe sprockets 24, As the chains 22 travel they move the pitman 19 downward which through the medium of the cross head 14 al lows the'sucker rod 13 to move downward V and as .the cross head 14 'movesfdownward it raises-the counter weights through the medium of the cables 51. When the'pitman 19 reaches its downward travel as shown in Fig. 5 and the chains 22 continue their travel they'move the pitman upward which throughthe medium of the cross head14 moves the sucker rod 13 upward on a fluid elevating stroke and thevcount-er weights45 move, downward with the weight thereof assisting .to "elevate Whenthe pitman 19 reaches the limit of its upward travel the chains 22 move it downward again as previously described and this upward and downward travel of'the pitman continues as long as themotor 43 isoperating.

" Any length of pumping stroke desired may be. obtained lbyraaltering the distance between the sprockets 23 and 24 and by providing for the corresponding raising or lowv ering :ofthe counter weights 45.

rom the foregoing description itwilli be apparent thatl'have provided a novel long stroke pump 3 structionandlhighly efficient in use. 1 1* Having thus described my nventiong l. claim: "I 1 1 1. vForuse with-a well casingi having a sucker rod therein, a' pump :jack, 'said pump jack including a supporting frame, a cross afl-plurality of weighted memberseon said head, spaced guides on said frame in which said cross head mamas, means to connect 'isaid sucker rod to said cross-head,'meaus to reciprocate said sucker rod, a movabletable,

table, a plurality of spaced, upwardlyeXtending tubes secured tosaid'table, a plate on said 7 frame, a plurality. of spaced,upward1y extlielimit a ack which is simple in contending rods secured to said plate, said rods being positioned in said tubes, a plurality of pulleys mountedon said frame, a cable supported by each of 'saidpulleys, one end of each ofsaidcables being secured to one of sa1d tubes and the opposite end being secured to sa d cross .head whereby. when said cross head is in a lowered position said table is inand theioppositee'nd 'ofsaid'pitman being pivotallyjconnected 'to said chain connecting member, said upper sprockets being mounted on shafts journaled in hearings on saidframe,

said lower sprocketsbeing mounted on shafts journaled in bearings on said frame, drive sprockets secured to said last mentioned shafts, a speedreduction transmission,;means to drive said transmission, means to drive said drive sprockets from said transmission, V a; weighted member, a plate on said frame,

means on said plate toguide said member and nilans toconnect said member to said sucker ro.' 3. A pump jack including a supporting frame, a cross head, spaced guides on said frame in which saidjcross-head actuates, a

sucker rod, means to connect said sucker rod to said cross heafd, a pair of spaced endless chains, each of said chains being mountedon a lower sprocket and an upper sprocket, av

connecting member secured to said chains, a pitman, one endofsaid pitman being connected to said cross-head and the opposite end' of said pitman being-connected to said chain connecting member, said upper sprockets be ing mounted on shafts on said frame, said lower sprockets being mounted on 'shaftsjon saidframe, drivesprockets secured to said last mentioned shafts, a speed reduction transmission, means to drive said drive sprockets from said transmission, a movable table, a

plurality of weighted members on saidtable,

aplurality offspaced, upwardly extending tubessecuredj to said: table, a plate on. said -frame, aplurality of spaced, upwardly extending'rods secured to said plate, said rods vbeing positionedin saidtubes, a plurality of pulleys mounted'on said frame, a cable sup- 1 ported by each of said pulleys, one end of each of said cables being 'secured'toone of said tubes and the oppo to said crosshead. 4;. For use with a well casinghaving-a sucker rod therein, a pump jack, saidpump ite endbeingsecured jack including a supporting frame, a cross pivotally head, spaced guides on said frame in which said cross head actuates, means to connect said I.

sucker rod to said cross head, a pair of spaced endless chains, leach mounted on a lower sprocket and an upper sprocket, a connecting member secured to said chains, a pitman, one end of said pitman being pivotally connected to said cross head and the opposite end of said pitman being connected to said chain connecting member, said upper sprockets being mounted on shafts journaled in bearings on saidframe, drive sprockets secured to said last mentioned shafts, a speed reduction transmission, means to drive said transmission and means to drive said drive sprockets from said transmission, a movable table, a plurality of weighted members on said table, a plurality of spaced, upwardly extending tubes secured to said table, a plate on said frame, a plurality of spaced, upwardly extending rods secured. tosaid plate, said rods being positioned in said tubes, a plurality of pulleys mounted on said frame,

a cable supported by each of said pulleys, one end of each of said cables being'secured to one of said tubes and the opposite end being secured to said cross head whereby when said cross head is in a lowered position said table is in a raised position and vice versa.

In testimony whereof, I hereunto aflix my signature.

of said chains being journaled in bearings on said frame, i said lower sprockets being mounted on shafts WALTER E; columns. 7, 

